Context. Many prominences are supported by magnetic flux ropes. One important question is how we can determine whether the rope weakly twisted or highly twisted. Aims. In this paper, attempt to decipher and ropes manifest different features so that might distinguish two types of structures based on their appearance. Methods. We performed pseudo three-dimensional simulations with twists. Results...

Lyα and Lyβ line profiles in a solar prominence were observed with high spatial and spectral resolution with SOHO/SUMER. Within a 60 arcsec scan, we measure a very large variety of profiles: not only reversed and non-reversed profiles but also red-peaked and blue-peaked ones in both lines. Such a spatial variability is probably related to both the fine structure in prominences and the different...

In this paper we study the occurrence rate and solar origin of interplanetary coronal mass ejections (ICMEs) using data from the two Solar TErrestrial RElation Observatory (STEREO) and the Wind spacecraft. We perform a statistical survey of ICMEs during the late declining phase of solar cycle 23. Observations by multiple, well-separated spacecraft show that even at the time of extremely weak so...

In this paper we examine different approaches to obtain judgments of perceptual prominence. It discusses the use of different scales, the influence of the linguistic level on which the prominence is rated and the normalisation of prominence judgments. We propose the use of a multilevel scale to obtain prominence judgments. It seems that naı̈ve listeners can rate word prominence better than sylla...

On February 12, 2021 two subsequent eruptions occurred above the West limb, as seen along Sun-Earth line. The first event was a typical slow Coronal Mass Ejection (CME), followed $\sim 7$ hours later by smaller and collimated prominence eruption, originating Southward with respect to CME, plasma blob. These events were observed not only SOHO STEREO-A missions, but also suite of remote sensing i...

We present Doppler imaging and Balmer line analysis of the weak-line T Tauri star TWA 6. Using this data we have made one of the first attempts to measure differential rotation in a T Tauri star, and the first detection of a slingshot prominence in such a star. We also show the most direct evidence to date of the existence of solar-type plages in a star other than the Sun. Observations were mad...